Threshing-machine.



0. A. AMBLE.

THBESHING MACHINE. APPLICATION PILED JULY a1. 1909 938,624. v Patented Nov. 2,1909.

qttouwuo To allwhom it ma OLE A. AMBLE, OF'VVGRAND. FORKS, NORTH DAKOTA.

THRESHING-MACHINE.

Specification of Letters Patent.

Application filed July 81, 1999. Serial No. 510,543.

concern: 1

Be it known tltllLI, OLE A. AMBLE, a citizen of the United States, residing in Grand Forks, in the county of Grand Forks and State of North Dakota, have invented certain new and useful Improvements in Threshing-Machines, of which the following is a specification.

The object of my invention, is to provide improved means for attaching teeth to the cylinders of threshing machines, but my improvementsmay also be employed for attaching teeth to the concaves of threshingmachines, and for attaching teeth to other supports. 3

,1 According to my invention the teeth are made wedgeshaped or tapered or have wedge-shaped or tapered portions which onter corresponding'holes in the tooth-supporting bars, and these bars are also tapered andadapted to fit in groovesv or recesses formed in the cylinder frame or in the parts which support the tooth-bearing bars.

' In order to lock the bars in place, I emp1oy what I call locking bars; these are adapted to enter recesses below the recesses whlch receive the tooth-supporting bars and are adapted to have an endwise movement.

therein. The inner or under face of. each locking bar is formed with a series of wedges or inclines which are adapted to move on the bottom portions of the recesses in which the locking bar slides, the arrangement being such that in one position the locking bar firmly engages the tooth-supporting bar and holds it rigidly in place, and at the same time also holds the teeth securely in position, but in another position of the locking bar,

the engagement between said bar and the 40.

tooth-supporting bar is loosened so that the tooth supporting bar may be readily removed from the' cylinder.

In the accompanying drawings, Figure 1 is a view partly in section and partly in elevation illustrating how my improvements may be applied to the cylinder of a threshing machine. Fig. 2 is a plan view of the upper or outer face of the tooth-supporting bar, with teeth mounted therein. Fig. 3 is a View partly in and elevation and partly in section of a threshingmachine cylinder with my improvements applied. Fig. -11 is a detail view on an enlarged scale, illustrating how the teeth areheld in the tooth-supporting bar, and-also showing the cross-sectional shape of this bar. Fig. 5 is a perspective view of one of the teeth. Fig. 6 is a perspectiveview, showing the teeth-supporting bar, the teeth carried therein, and the lock ing bar which cooperates therewith.

The teeth A. are preferably tapered, as shown, or have wedge-shaped p rtions a which enter corresponding sockets Z) in the tooth-supporting bars B. I have illustrated a threshing machine cylinder in which sixteen tooth-supporting bars are employed, but this may, of course, be varied. The bars are all of the same construction and are connected with the frame of the cylinder in the same way. Each bar B, as illustrated, in Fig.2, is tapered from one end Z) to its opposite end Z) and it is provided with a serlesof holes 5 to receive a suitable number of teeth A. When the teeth are arranged in the holes their outward movement is limited and they fit closely so as not to be able to wabble or move sidewise while they are prevented from moving inward by thelocking bar hereinafter more fully described.

The frame of the cylinder is shown as con- .sistin of a series of disks D, mounted on the shaft E. These disks are provided on their peripheries with a suitable number of recesses c to receive the tooth-supporting bars B, and they are also provided with corresponding recesses .to receive the locking bars 0.

As shown in Fig. 4, each tooth-supporting bar is dove-tailed to fit a corresponding formation in the disks D, so that the bars may slide endwise across the peripheries of the disks butare prevented from moving in any other direction. The recesses to receive the bars 13 gradually taper from the end X of the cylinder to the end Y, sothat when the locking bars are moved across the cylinder to their full extent they will be tightly held in place. In order, however, to more sebars C are employed, ere being one such locking bar for each tooth-supporting bar. The locking bars enter recesses between the inner ends of the recesses c which receive the bars P and the axis of the cylinder. Each locking bar, as shown in Figs'l and 6, is provided with concaved portions c and raised portions 0 V Then the concaved portions are in line with'the disks the locking bars loosely engage the tooth-supporting bars but when the raised portions engage the. disks the locking bars are firmly held against the under or inner sides of the tooth-supporting Patented Nov. 2, 1909.

bars so that a rigid connection is made between the' tooth-supporting bars and the disks. Each tooth-supporting bar is preferably formed with a flange H Which, when the parts are assembled, extends across the end H of its companion locking bar and a bolt I is employed to secure the locking bar to the tooth-supporting bar. When thus assembled and secured, as shown in Fig. l, the parts are all firmly connected and there is no danger of their separation in the ordinary ope ation of the machine.

In order to detach a too'tlrsupporting bar from the machine it is only necessary to re move the bolt I and then slide the locking bar to the right, as shown in Fig. 1. This will loosen the connection and the tooth-supporting bar may be detached without dis turbing any of the other bars. Any tooth in this bar may be easily removed and replaced if necessary. In this way I am able to provide threshing machine teeth of very simple formation and not involving the use of screw threads or nuts for securing them .in place, and there is absolutely no danger of the teeth becoming loosened.

I claim as my invention 1. The combination of a support provided with undercut recesses, a tooth-supporting bar arranged to slide endwise in said recesses, and a locking bar operating in the inner portions of said recesses beneath the tooth-supporting bar and having wedges operating on the inner walls of the recesses to force said tooth-snpporting bar outward.

2. The combination of a support provided with undercut recesses, a tooth-supporting bar arranged to slide endwise in said recesses and having tapered opcningsio receive the teeth, teeth having tapered bases arranged in' the recesses of the toothsupporting bar, and an endwise moving locking bar operating beneath the tooth-supporting bar and having wedges operating on the inner walls of the recesses to cause the locking bar to press the teeth outward in the tooth-support ng bar.

it. In a threshing machine cylinder the.

combination of the supporting disks having undercut recesses in their peripheries, toothsnpporting bars arranged to slide endwise in said recesses, and cndwise moving locking bars arranged in the recesses between the axis of the disks and the peripheries thereof and each having wedges operating on the inner walls of said recesses to force the'toothsupporting bar and the teeth carried thereby outward.

it. In a threshing machine cylinder, the combination of the supporting disks having undercut recesses in their peripheries, end-- wise moving t mth-supporting bars arranged in said recesses and having tapered o enings tor the teeth, teeth having tapere inner ends arranged in said recesses of the toothsupporting bars, and endwis'e moving locking bars arranged in the recesses between the axis of the disks and the peripheries thereof and each having wedges operating on the'inner walls of said recesses to force the teeth radially outward.

.ln a threshing machine cylinder, the combination of the supporting disks, the tapered tooth-supporting bars having dovetailed sliding connectionwith the disks, endwise. moving locking bars engaging the under sides of the tooth-s1ipporting bars and having wedges engaging the disks, and means for connecting the end of each toothsupporting bar with its locking bar.

(3. The combination of the tooth-supporting bars, having outwardly tapered holes, the teeth having tapered portions engaging the holes in the tooth-supporting bars, the endwise moving locking bars engaging the under sides of the tooth-sup mrting bars and holding the teeth in place, and provided with wedges on their inner or under sides, and supports in which the tooth-supporting bars operate.

in testimon whereot'. l have hereunto subscribed my name. 

